I have built a flash movie that has 8 options which you can
turn ON and OFF via radio buttons. Some of the options can not be
on at the same time as others. (Example: Option 3 cannot be ON at
the same time as Option 6.)

Is there some code that I can attach to the radio buttons so
that if Option 3 is turned ON and the user then clicks Options 6
ON, it will turn Option 3 to OFF?

well I think you can do an event handler when you click a
radio button so you can probably check to see which ones are
clicked when you click 6 and if 8 is clicked then disable it. go to
the radio button and put an action on it like
on (click) {
whatever youw ant to do;
}
you would do this for the 2 buttons you want to make sure are
not on at the same time. maybe this will help idk good luck!